Pin inserting machine



Oct. 10, 1944. V w E PARKS 2,360,158

PIN INSERTING MACHINE Filed Oct'. 8, 1943' 2 Sheets-Sheet 1 mvmmn. Wes/.07 E P4449168.

0a. 10, 1944. E PAR'KS; 2,360,158 PIN INSERTING MACHINE Filed Oct. a, 1943 -2 Sheets-Sheet 2 h m Hnl s TIIIIIIIIIIIIIIIlII.

ATTOENEK Patented Oct. 10, 1944 UNITED STATES PATENT" OFFICE PIN- INSERTEING MACHINE Wesley E. Parks, Bedford, Ohio, assignor, by mesne assignments, to Jack & Heintz, Inc., Cleveland, Ohima-colporatiDn of Ohio Application October 8, 1943, Serial No. 505,579

Claims;

tion and appended claims, certain embodiments thereof being illustrated in the accompanying drawings in which:

Figure 1 is a view in side elevation ofa pin inserting machine showing a multi-pin holding barrel mounted on the end of a movable rack, the

rack being shown in a retracted or non-operating position.

Figure 2 is a view in front elevation of the machine at right angles to'Figure 1.

Figure 3 is a partially sectioned view in side elevation showing .the barrel portion of the machine inserting a pin into a piece of work and at the same time receiving a pin from thefeed line. I Figure 4 is a partially cross-sectioned view of the feed and air lines showing-a pin being ejected into a portion of the barrel.

Figure 5 is a bottom plan View of a portion of the barrel.

Referring more particularly to Figure l, the assembly includes a base I supporting an angle member '2. which in. turn forms a support for the working members of the machine. Also mounted on the base I is a work aligning plate 3 havingan indexing slot 4.

Further description of this pin inserting machine may be best understood by a detailed discussion of its operation. It is realized; that by various alterations of the dimensions of the integral parts of the machine, work of numerous dimensions could be handled; but, for the purpose of clarity, the discussion of operation will be limited to the insertion of pins into a gyro gimbal as shown in Figure 3.

A gimbal 5 is placed in a position for receiving a pin from a barrel 6 by means of work aligning plate 3 having the raised portion 30. A leverl, which is rigidlyconnected to a pinion gear 8, is moved downward, thereby rotating the pinion gear counterclockwise and causing a rack'9, having gearteeth meshing with the teeth of the pinion gear, to move downward also. Rigidly connected, by means of bolts lllvand H to frame member 2, is a rod l2 having a finger I3 at its lower extremity which contacts the surface of barrel 6 under the pressure of a spring 29 shown in Figure 5.

As the rack 9 moves downward, finger I3 rides on the inclined plane groove 14 until a pin l6 aligns itself with a hole 33 in the gimbal 5. At this point the finger l3 has been forced back toward itsbase against action of spring 29 due to its contact with downward moving inclined plane I4. rack the finger l3 rides over the radial surface of barrel 6 until itengages, under spring action, a groove I5 in the barrel at-a point directly above the groove Hij As the downward movement of the rack is being completed, the pin l6, which -is threadedon one end and longitudinally grooved at the other,is-forced, grooved end first, into a hole-33 in the gimbal having a diameter slightly smaller than the diameter ofthe pin. As the pin is: inserted into the hole in the gimbal under pressure from the operating lever I, the longitudinal grooves in the pin make it possible for the pin. metal to flow until the diameter ofthe pin equals the diameter of the hole and a tight friction connection is assured.

As the downward movement of the barrel and rack is almost completed, a bolt IT on member l8, which is rigidly mounted on rack 9 by bolt 2!, contacts push button valve stem l9of an airvalve 20, opening said valve and permitting air under pressure to be admitted to a feed line 22by means of an air line 23'. Under this'air pressure the pins in line 22 are forced upward toward'an orifice 24, the outermost pin being ejected threaded end first into an empty slot 35 m the pin holding barrel 6 where it is held in place by a coil spring 34. The opposite end of the pin which extends part way into the orifice 24keeps any other pins from being ejected in the same operational cycle;

As the rack 9 is moved downward, barrel 6. is

kept from rotating by means of anindeking mechanism 36 consisting of a spring 28 and a ball 21, which engages a notch'3l in the tailpiece portion 32 of the rack 9. The notches 3| correspond in number and position to the vertical grooves M on the barrel, so that the barrel is always kept from rotating as finger I3 is riding in a vertical As the lever i is raised, the pinion gear 8 mov-- ing clockwise raises the rack 9 and barrel 6; causing. the bolt H to disengage valve stem 19, and

the valve seat closes under spring pressure. so.

the barrel, the slot from which a pin was just ejected is aligned with orifice 24 and another pin is aligned for ejection into another gimbal frame 5, Indexing mechanism 36 is disengaged by this action. Thus it may be seen as in Figure 3 that the barrel which has a pin receiving slot corre- Upon further downward movement of the sponding to each vertical groove may be aligned When the feed line 22 a position between two individual magazines so that air pressure from the air line 23 may not back up through line 22 into the magazines.

,Since the gimbal 5, being described as the work in this specification, requires two pins, one at either end on reverse sides, it is merely necessary to turn said gimbalaround and over for a second pin insertion. The first pin will fit into indexing slot 4 in the work aligning plate as the opposite end becomes aligned for receiving a pin from barrel 6.

'A rod 31, threaded on both ends and fitted into the frame 2 at one end, extends through slot 49* in member I8 and acts as a guide for member l8 as the rack is moved downward to ascertain the engagement of valve stem I9 by bolt IT. The nuts 38 and 39 are provided merely as upper and lower limits for the movement of rack 9.

I claim:

1. In a pin inserting machine comprising a movable rack, a multiple slotted rotatable barrel mounted on the lower end of said rack, a magazine feed, a'feed line from said magazine feed leading to a position beneath one of a plurality of' pin receiving slots in said rotatable barrel and a pneumatic system connected to said feed line, means to move the rack vertically, indexing means to prevent the rotation of the barrel as said rack is moved downward, means responsive to the completion of the downward movement of the rack for opening a valve in the pneumatic system, means responsive to the pneumatic pressure admitted to the pin feed line as said valve is opened for ejecting a pin from the orifice of said feed line into the rotatable barrel, thereby feeding a single pin into said barrel during each cycle of operation, resilient means for holding said pin in the barrel and responsive to friction and metal fiow of the pin as it is forced intoa piece of work for allowingremoval of said pin from the rotatable barrel and means responsive to the raising of the rack' for allowing the valve in the pneumatic system to close and for causing the barrel to be rotated the amount necessary to align another pin for insertion into work and to align another slot, emptied by a preceding loading operation, with orifice of the feed line.

I 2. In a pin inserting machine comprising a supporting frame, amovable rack mounted on said frame, a multiple slotted rotatable barrel mounted on'the lower end of said rack, a magazine feed, a feedline from said magazine feed leading to a position beneath one of a plurality of pin receiving slots in said rotatable barrel and a, pneumatic system connected to said feed line, a manually operated means to raise and lower the rack, spring actuated indexing means to prevent the rotation of the barrel as said rack is moved downward, means integral with the rack for opening a valve in the pneumatic'system as said rack completes a downward movement, air pressure means responsive to the opening of said valve by said rack means for ejecting a pinfrom the orifice of the feed line to load a slot in the rotatable barrel, the position of a pin in the barrel following ejection from the feed line permitting only that single pin to be ejected during each cycle of operation, resilient means for holding said pin in the barrel, friction and distortion incident to insertion of a pin in a piece of work removing a pin from the barrel'after said pin is forced into a slot in a piece of work, this insertion occurring simultaneously with the downward movement of the rack and the operation of the air pressure loading means, means responsive to the raising of the rack for allowing the pneumatic system valve to close, and guide means, fixedly attached to the frame at one end and having a resilient finger at the other end engaging an angular groove on the periphery of the rotatable barrel, for causing the spring actuated indexing mechanism to be disengaged and for causing the barrel to be rotated the amount necessary to align another pin for insertion into work and to align another slot, emptied by a preceding inserting operation,- with the orifice movable rack, a rotatable multiple pin holding barrel mounted on the lower end of said rack and a pneumatically propelled feed system, means responsive to lowering of said ram for causing a pin from said feed system to be ejected into said barrel, means for holding the pin in the barrel until the insertion of the pin from the barrel into work for removing said pin from said barrel, so that said insertion will occur at the same time the barrel is receiving the aforementioned pin from the feed line, and means responsive to the raising of the rack to rotate the barrel to a position for insertion of another pin into the work and to align another slot in said barrel, emptied by a previous insertion, with the orifice of the feed line for receipt of another pin.

4. In a pin inserting machine, a holder, means for moving the holder, a pneumatically propelled feed system comprising a multi-barreled, rotatable magazine feed for holding pins and the like, a loaded feed line leading from said magazine feed to a position for ejection of pins from the orifice of said feed line into said holder, a multiple number of air lines connected to said feed line, all of said air lines converging into a main air line, and a valve in said main air line, means responsive to the movement of the pin holder into ,a position adjacent to the feed line orifice, for operating said valve to release compressed air into the air lines and consequently to the feed line to cause the pins in said loaded feed line to move toward the feed line orifice and to eject a pin or pins from the feed line into the pin holder.

5; In a pin inserting machine comprising a rotatable, multiple slotted, pin holding barrel, a pneumatic feed line, and a multiple magazine feed for loading said feed line, pneumatic pressure means for ejecting pins from said feed line into slots in said barrel, resilient means for holding said pins in the slots of said barrel, and said feed line, pressure means and barrel being so constructed and arranged that the same will be responsive to the ejection of the first pin from the feed line into said barrel for allowing only one pin at a time to-be ejectedfrom said feed line.

, WESLEY EIPARKS. 

